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Anthropogenic factors responsible for emerging and re
Anthropogenic factors responsible for emerging and re

... in around 250,000 people in USA in 1985 due to contaminated milk. Similarly, a widespread outbreak of Salmonella occurred in 1994, when ice cream premix was transported in tanker trucks that had not been thoroughly sanitized after transporting raw liquid egg19. In 1982 Escherichia coli O157 : H7 was ...
For discussion on Paper No. CB(2)256/03
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... Guangdong and Hong Kong early this year called for urgent action to establish more effective communication channels between the two places to enable prompt and timely exchange of important information about infectious disease outbreaks and incidents. Expert groups from the two sides met in April and ...
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Unit 4A: Purpose of Standard Precautions and when they are applied
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... of investigation should be initiated when an increase in cases is noted. The intensity and scope of the investigation and response may differ depending on the number of cases, the magnitude of increase in a specified population, or some other factor. Figure 1 in Appendix B outlines the steps in an S ...
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... Psittacosis (Ornithosis, Chlamydiosis): Psittacosis is a disease caused by the bacteria, Chlamydia psittaci. Psittacosis is common in wild birds of all types and can occur in laboratory bird colonies as well. · Reservoir/source of infection to people: Infected birds, especially ones displaying sympt ...
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Sexually transmitted infection



Sexually transmitted infections (STI), also referred to as sexually transmitted diseases (STD) and venereal diseases (VD), are infections that are commonly spread by sex, especially vaginal intercourse, anal sex and oral sex. Most STIs initially do not cause symptoms. This results in a greater risk of passing the disease on to others. Symptoms and signs of disease may include vaginal discharge, penile discharge, ulcers on or around the genitals, and pelvic pain. STIs acquired before or during birth may result in poor outcomes for the baby. Some STIs may cause problems with the ability to get pregnant.More than 30 different bacteria, viruses, and parasites can cause STIs. Bacterial STIs include chlamydia, gonorrhea, and syphilis among others. Viral STIs include genital herpes, HIV/AIDS, and genital warts among others. Parasitic STIs include trichomoniasis among others. While usually spread by sex, some STIs can also be spread by non-sexual contact with contaminated blood and tissues, breastfeeding, or during childbirth. STI diagnostic tests are easily available in the developed world, but this is often not the case in the developing world.The most effective way of preventing STIs is by not having sex. Some vaccinations may also decrease the risk of certain infections including hepatitis B and some types of HPV. Safer sex practices such as use of condoms, having a smaller number of sexual partners, and being in a relationship where each person only has sex with the other also decreases the risk. Circumcision in males may be effective to prevent some infections. Most STIs are treatable or curable. Of the most common infections, syphilis, gonorrhea, chlamydia, trichomoniasis are curable, while herpes, hepatitis B, HIV/AIDS, and HPV are treatable but not curable. Resistance to certain antibiotics is developing among some organisms such as gonorrhea.In 2008, it was estimated that 500 million people were infected with either syphilis, gonorrhea, chlamydia or trichomoniasis. At least an additional 530 million people have genital herpes and 290 million women have human papillomavirus. STIs other than HIV resulted in 142,000 deaths in 2013. In the United States there were 19 million new cases of sexually transmitted infections in 2010. Historical documentation of STIs date back to at least the Ebers papyrus around 1550 BC and the Old Testament. There is often shame and stigma associated with these infections. The term sexually transmitted infection is generally preferred over the terms sexually transmitted disease and venereal disease, as it includes those who do not have symptomatic disease.
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